Insulator-pin.



PATENTED NOV. 21, 1905.

L. STEINBERG-ER.

INSULATOR PIN.-

APPLIGATION FILED JAN.3.1905.

/NVENTOH Loaz' Hez'nefgef Arrow/EVS LOUIS STEINBERGER, OF NEW YORK, N.Y.

INSULATOR-PIN.

Specicaton of Letters Patent.

Patented Nov. 21, 1905.

Application filed January 3, 1905. Serial No. 239,355.

To a/ZZ whom it may concern.:

I electrose,made up of a cylindrical portion Be it known that I, LOUISSTEINBERGER, a l 11, frusto-conical portions 12, 13, 14, and 15,

citizen of the United States, and a resident of the city of New York,borough of Brooklyn, in the county of Kings and State of New York, haveinvented a new and Improved Insulator- Pin, of which the following is afull,.clear, and exact description.

My invention relates to devices for the support and insulation ofelectrical conductors, and more especially to insulator-pins used inconnection with currents of high voltage.

My more particular objects are to so improve the insulation as to lessenthe tendency under wet-weather conditions of a high-voltage current toarc over the surface of an insulator or its support or partly over thesurface of an insulator and partly through the air from the conductor tothe ground or to the support for the insulator, if this support begrounded. sulating device and its accompanying parts from deleteriousaction by the weather and to enable it to be used for supportinginsulators or for supporting a conductor directly, if desired.

In addition to the objects above enumerated I strengthen the support forthe cable or other conductor and increase the durability of the support,so that it may do its duty fairly well even when broken or otherwisebadly damaged. I also shield certain metallic parts not directly used insupporting the cable, so as to prevent the possibility of an arc to anypart of the supporting-pin or of its immediate connections.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a vertical section through an insulator-pin made inaccordance with my invention. Fig. 2 is an inverted plan View of thebody portion ofthe pin removed from the cross-arm. Fig. 3 is a verticalsection through the cap 25, of insulating material; and Fig. 4 is aplanview of the cap removed from the cross-arm.

The cross-arm is shown at 5 and is provided with a bored aperture 6 ofthe usual form. A tubular core 7, of metal, is provided withindentations 8, constituting anchorages, the upper end 9 of this tubularmember being closed, the other end 10 being threaded externally andconstituting a shank. Encircling this core is a mass of insulatingmaterial, preferably I also seek to preserve the inand a shank portion16. rlhe cylindrical portion 11 is provided with an annular step orshoulder 17, the frusto-couical portions 12 and 13 are provided withannular steps or shoulders 18 19, and the frusto-conical portions 1415are provided with annular recesses 2O 21. The frusto-conical portion 15issurmounted with a cylindrical stem 22, threaded externally at 23 andprovided at its top with a slot 24. The thread 23 is for the purpose ofengaging an insulator, preferably of the socalled hood type, and theslot 24 is for the purpose of engaging a conductor directly should it bedeemed advisable to use the same in the absence of an insulator.

Below the cross-arm 5 is a cap 25,0f insulating material, preferablyelectrose, engaging' a washer 25", of soft rubber. This cap is providedwith facets 26, whereby its periphery is rendered angular for thepurpose of enabling it to be readily turned. Embedded within this cap isa metallic portion 27, provided with an annular flange 28 and with asleeve portion 29, the latter having a threaded portion 30 for engagingthe lower end or shank portion 10 of the tubular core 7. A revoluble nut31, threaded internally, also engages this threaded shank, and anannular washer 32 is preferably employed in connection with the nut 81,but being removable is not essential. The tubular core 7 is united tothe jacket of insulating material encircling' it preferably by molding,the anchorages 8 effective] y preventing movement between the parts.

The insulator-pin is assembled as follows: The body portion of the pin,provided with a threaded shank 10, is mounted in the position indicatedin Fig. 1, the shank 16, of insulating material, projecting nearly butnot vquite through the aperture 6. The washer 32 is next slipped looselyover the shank 10, the nut 31 is tightened so as to bind the washer 32rigidly against the under face of the crossarm, and the shoulder 17, ofinsulating material,is thusdrawn down tightly upon the upper surface ofthe cross-arm. soft rubber, and the cap 25 are next applied, thethreaded sleeve 29 engaging the threaded shank 10. The purpose of thiscap is not merely to reinforce the nut 31, though it incidentally hassuch a slight effect, but is mainly to insulate the nut 31, the shankl0, and all other metallic parts. Arcing is thus effect-- ivelyprevented. The cap 25 and the washer The washer 25, of

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25 being removable may be omitted, if desired. The shape of theanchorag'es 8 is iinmaterial, round shallow holes answering everypurpose.

By the construction above described no metallic parts whatever areexposed either to the danger of arcing or to the action of theweather-that is to say, the tubular metallic supporting-stem 7 and allmetallic parts in electrical communication therewith are completelyinclosed with insulating' material.- The washer 25 serves as a gasketand excludes the entrance of moisture in case the under face of thecross-arm is wet.

The structure admits of general use, but is of special valueupon linesin which a breakdown of the wiring mig'ht be disastrous to life andproperty.

I do not limit myself to the exact details of any or all of the partsabove described, no1' to any particular combination of elements enteringinto the construction of the insulatingpin. Neither do l limit myself toa hollow lnetallie core, nor to any particular material to be employedin making any of the insulated parts.

Having thus described my invention, I claim as new and desire to secureby Letters Paten t- 1. An insulator-pin, comprising a member ofinsulating material provided with a slot for supporting a conductor, andalso provided with a thread for supporting an insulator on said memberofinsulating' material, and means for supporting said member of insulatingmaterial.

2. As an article of manufacture, a metallic member provided with a shankportion, and insulating` material enveloping said metallic member butleaving said shank portion exposed,said insulating material having athreaded portion and also a slot for eng'aging'aconductor.

3. An insulator-pin, comprising a body portion of insulating material, ametallic core partially embedded within said body portion, and havingone of its ends extending' beyond the bounds thereof, said body portionbeing' provided with means for engaging an insulator, and a cap mountedupon said end of said core, thus extending beyond the bounds of saidbody portion.

4. An insulator-pin, comprisinga body poi'- tion of insulating materialprovided with means for engaging' an insulator, a metallic corepartially embedded within said body portion, said metallic core havingone of its ends extended beyond the bounds of said body portion, alocking device for locking' said core to a support, and separate meansmounted directly upon the end thus extended for the purpose ofinsulating said locking device and the end of said metallic core fromcurrents flowing adjacent to said insulator.

5. An linsulator-pin, comprising' a metallic supporting member, a jacketof insulating' masealer l terial enveloping said metallic member andprovided with a surface for supporting an insulator, said jacket being'provided with a plurality of hoods superposed one on the other, andmeans for mounting said metallic member upon a support.

6. An insulator-pin, comprising a metallic member, and a jacket ofinsulating' material enveloping' said metallic member and molded rigidlythereupon, said jacket of insulating l material being provided with a/plurality of f superposed hoods integral therewith, and further providedwith a surface Yfor eng'aging an insulator.

7. An insulator-pin, comprising a metallic member provided withanchorages, and a jacket of insulating' material enveloping' saidmetallic member and engaging said anchorages, said jacket of insulatingmaterial being' further provided with a plurality of superposed hoodsand with a portion for supporting an insulator.

8. An insulator-pin, comprising a metallic member, means for supporting'the same, and a member of insulating' material mounted upon saidmetallic member, said member of insulating material being provided witha hood integral therewith, and further provided with a threaded surfacefor supporting' an insulator.

9. As an article of manufacture, a metallic supporting member providedwith a shank portion, and a jacket of insulating' material provided witha plurality of superposed hoods and enveloping' said metallic member butleaving' said shank portion exposed.

l0. An insulator-pin, comprising a body portion of insulating materialprovided with a threaded portion for detachably supporting' aninsulator, and also provided with a plurality of superposed hoods, saidhoods terminating' at their bottoms in surfaces ofdilierent shapes, andmeans for supporting said body portion.

l1. An insulator-pin, comprising a body portion of insulating materialprovided with means whereby it may be mounted upon a support, said bodyportion being provided with a surface for detachably engag'ing aninsulator, and further provided with a plurality of hoods so as tovirtually present an interrupted surface.

12. An insulator-pin, comprising' a body portion of insulating materialprovided with means whereby it may be supported and with a surface fordetachabl y engaging' an insulator, said body portion being' furtherprovided with a plurality of hoods integral therewith, and presenting' asurface which is virtually interrupted.

13. An insulator-pin,comprising' a plurality other, the bottoms of thehoods being' provided wlth drip-surfaces of different shapes, and ametallic member for supporting said separate hoods.

of separate hoods superposed one over the 14. An insulatorpin,comprising' a body IOO portion of insulating material provided with aplurality of hoods integral therewith, said hoods being provided withdrip-surfaces of different conformity and virtually presenting aninterrupted surface, said body portion of insulating material beingprovided with means for supporting an insulator.

15. An insulator-pin, comprising a body portion of insulating materialprovided with a hood and with a portion for engaging an insulator, vsaidbody portion being further provided with means whereby it may bemounted.

16. An insulator-pin, Comprising a body portion and a plurality ofseparate hoods conneoted to the same, said body portion being furtherprovided with means for engaging an insulator and with means wherebysaid body portion may be mounted.

to this specification in the presence of two sub- 30 seribing witnesses.

LQUIS STEIN BERGER.

vWitnesses l VVALTON HARRISON, EvERARD BOLTON MARSHALL.

